Sanding device.



E. H. DEWSON.

SANDING DEVIGE.

APPLICATION FILED JUNE 15, 1912.

LRSLfILYM Patented M1119, 1915.

WITNESSES THE NORRIS PETERS Co F'HOTO-LITHQ. WASHINGmN. D. C

ATE

EDWARD II. DEWSON, OF NEW YORK, N. Y., ASSIGNOR TO THE WESTINGHDUSE AIR BRAKE COMPANY, OF WILMERDING, PENNSYLVANIA, A CORPORATION OF PENN- SYLVANIA.

SANDING DEVICE.

Specification of Letters Patent.

. Patented Mar. 9, 19156..

To all whom it may concern."

Be it known that I, EDWARD H. DEwsoN, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented new and useful Improvements in Sanding Devices, of which the following is a specification.

This invention relates to sanding devices for railway service, and more particularly to a valve mechanism for controlling the fluid under pressure employed in supplying sand to the rails.

The principal object of my invention is to provide an improved valve mechanism of the above character.

In the accompanying drawing, Figure 1 is an elevation of an engineers brake valve embodying my invention; Fig. 2 a horizontal section on the line aa of Fig. 1, and Fig. 3 a plan view of the construction shown in Fig. 1.

While my improvement may be applied to various forms of manually controlled valve mechanisms, the invention is shown in the drawing in connection with a brake valve of the usual construction.

In accordance with my invention, a sand valve casing 1 is provided which is adapted to be secured to the flat horizontal face 2 of the brake valve 3, preferably by means of the usual brake valve bolts 4:. Within the casing on opposite sides of the brake valve stem 5 are mounted valves 6 and 7 A passage 8 in the casing 1 communicates with chambers 9 and 10 on one side of the valves 6 and 7 respectively and chambers 11 and 12 at the opposite side of valves 6 and 7 are in open communication with the respective passages 13 and 1 1 leading to a sand valve port. A port 15 opens into the passage 8 and is adapted to supply fluid under pressure to said passage from a suitable source of fluid pressure such as the main reservoir. The valves 6 and 7 are provided with stems 16 and 17 respectively and said stems carry push rods 18 and 19 adapted to project out from the casing, as shown. The brake valve handle 20 is provided with a downwardly extending lug 21 so positioned that the movement of the handle in one direction causes the lug to engage one of the push rods while the movement in the opposite direction causes the lug to engage the other push rod. The push rod 19 is so positioned that the same is adapted to be operated by the movement of the handle 20 to emergency application position, and the push rod 18 is adapted to be operated when the brake valve handle is moved slightly beyond the usual release po sition.

In operation, upon movement of the brake valve handle to emergency application position, the push rod 19 is moved inwardly by the lug 21 and the valve 7 is thereby opened to admit fluid under pressure to the sand port 14:. With this construction, it will also be seen, that sand can be used in starting, by moving the brake valve handle to the left of the normal release position, so as to open the valve 6 for admitting fluid to the sand port. The valves 6 and 7 are normally held to their seats by the respective springs 22 and 23 and preferably the push rods 18 and 19 are constructed so as to seat, when operated by the movement of the brake valve handle, and thereby prevent possible leakage of fluid under pressure around the stems of the valves.

Having now described my invention, what I claim as new and desire to secure by Letters Patent, is

1. In a track sanding device, the combination with a brake valve device comprising valve means and an operating handle therefor movable only in a direction to operate said valve means, of a valve for controlling the track sanding and a lug car ried by said handle and adapted to operate the sand valve upon movement of the brake valve handle beyond release position.

2. In a track sanding device, the combination with a brake valve device comprising valve means and an operating handle therefor movable only in a direction to 0perate said valve means, of a valve for controlling the track sanding and a fixed lug on said brake valve handle for operating said sand valve both in applying and in re- 4:. In a track sanding apparatus, the combination with a brake valve provided With for track sanding. the usual operating handle and having a In testimony whereof I have hereunto release position Q1119. an elmergency appliset my hand. 5 cation osition, 0 a va ve operated by movemeilt of the brake valve handle beyond EDVARD DEVVSON' release position for supplying fluid for Witnesses: track sanding and a valve operated upoii A. M. CLEMENTS, movement of the handle to emergency ap- E. C. TRAUTMAN.

plic'ation position for also supplying fluid l0 Gopiesof this patent may be obtained for five cents each, by addressing the Commissioner of Yatents, Washington, D. 0." 

